---
title: "Changelog"
description: "Track the latest updates, features, and improvements to MCPJam Inspector"
---

## Overview

This changelog tracks all notable changes to MCPJam Inspector. We follow [Semantic Versioning](https://semver.org/) and keep our changelog in the spirit of [Keep a Changelog](https://keepachangelog.com/).

## Latest Releases

### Version 1.1.0

#### Improved

- **Code Quality**
  - Improved code consistency and maintainability

### Recent Updates

#### Added

- **OAuth Protocol 2025-03-26 Support**
  - Added support for original MCP OAuth specification (2025-03-26)
  - Direct RFC8414 discovery from MCP server base URL with fallback endpoints
  - PKCE required for all clients
  - DCR and pre-registered client registration strategies

- **OAuth Debugger Enhancements**
  - Edit Config button to modify server settings without reconnecting
  - Copy logs feature with guide and raw formats for debugging
  - Deprecated transport detection with migration guidance for HTTP+SSE servers
  - RFC 8707 compliant resource URL canonicalization

- **GPT-5 Model Support**
  - Added support for GPT-5 model variants: `gpt-5`, `gpt-5-mini`, `gpt-5-nano`, `gpt-5-chat-latest`, `gpt-5-pro`, `gpt-5-codex`
  - Organization verification notice for GPT-5 access

#### Improved

- **OAuth Flow**
  - Refined diagram focusing and zoom behavior for better step visualization
  - Improved error handling for expected 4xx responses during transport detection
  - Enhanced header merging in OAuth state machines across all protocol versions

- **Error Handling**
  - Enhanced streaming error handling in chat interface
  - Errors now display as inline alerts instead of failing silently
  - Better error messages from AI providers

### Version 1.0.0

#### Added

- **MCP Server Connection Management**
  - Support for STDIO, SSE, and Streamable HTTP transports
  - Multi-server connection support
  - Real-time connection status monitoring

- **LLM Playground**
  - OpenAI integration (GPT-3.5/4)
  - Anthropic Claude integration (Claude 2/3)
  - DeepSeek AI support (DeepSeek R1)
  - Ollama local model compatibility
  - Interactive chat interface with streaming responses

- **Tools & Resources Testing**
  - Tool execution and validation
  - Resource schema verification
  - Prompt testing interface
  - Real-time parameter validation

- **OAuth 2.0 Testing**
  - Guided OAuth flow setup
  - Token management
  - Scope verification
  - Refresh token handling

- **MCP Evals**
  - Automated compliance testing
  - Custom evaluation framework
  - Test result reporting
  - Performance benchmarking

- **Developer Tools**
  - Comprehensive logging system
  - Request/response tracing
  - Error reporting and analysis
  - Performance monitoring

#### Improved

- Enhanced UI/UX with modern design
- Better error messages and debugging support
- Optimized performance for large MCP responses
- Improved documentation and examples

#### Fixed

- Various bug fixes and stability improvements
- Memory leak fixes in long-running sessions
- Edge cases in MCP protocol handling

## Coming Soon

We're actively working on new features and improvements:

- Enhanced evaluation templates
- More LLM provider integrations
- Advanced debugging tools
- Performance analytics dashboard
- CI/CD integration support

## Stay Updated

- Follow our [GitHub repository](https://github.com/MCPJam/inspector) for the latest updates
- Join our [Discord community](https://discord.gg/JEnDtz8X6z) for announcements
- Check our [website](https://mcpjam.com) for release notes

## Reporting Issues

Found a bug or have a feature request? Please [open an issue](https://github.com/MCPJam/inspector/issues/new) on GitHub.
